projects / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 6a83dbb4 | 1 | #!/bin/sh |
| 41e33931 AF |
2 | ############################################################################### |
| 3 | # # | |
| 4 | # IPFire.org - A linux based firewall # | |
| 5 | # Copyright (C) 2007-2023 IPFire Team <info@ipfire.org> # | |
| 6 | # # | |
| 7 | # This program is free software: you can redistribute it and/or modify # | |
| 8 | # it under the terms of the GNU General Public License as published by # | |
| 9 | # the Free Software Foundation, either version 3 of the License, or # | |
| 10 | # (at your option) any later version. # | |
| 11 | # # | |
| 12 | # This program is distributed in the hope that it will be useful, # | |
| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
| 15 | # GNU General Public License for more details. # | |
| 16 | # # | |
| 17 | # You should have received a copy of the GNU General Public License # | |
| 18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
| 19 | # # | |
| 20 | ############################################################################### | |
| 6a83dbb4 MT |
21 | |
| 22 | . /etc/sysconfig/rc | |
| 23 | . ${rc_functions} | |
| 24 | ||
| 25 | eval $(/usr/local/bin/readhash /var/ipfire/main/security) | |
| 26 | ||
| 27 | case "${1}" in | |
| 28 | start) | |
| 29 | # Nothing to do here when SMT is forced on | |
| 30 | if [ "${ENABLE_SMT}" = "on" ]; then | |
| 31 | exit 0 | |
| 32 | fi | |
| 33 | ||
| 0bb25a4f MT |
34 | # Nothing to do when SMT is not enabled or not supported anyways |
| 35 | if [ "$(</sys/devices/system/cpu/smt/control)" != "on" ]; then | |
| 36 | exit 0 | |
| 559e94ba | 37 | fi 2>/dev/null |
| 6a83dbb4 | 38 | |
| 8531a950 | 39 | # Do not disable SMT inside virtual machines |
| 0e457b13 | 40 | if running_on_hypervisor; then |
| 8531a950 MT |
41 | exit 0 |
| 42 | fi | |
| 43 | ||
| f41a54a2 AF |
44 | # Disable SMT when the processor is vulnerable if SMT is enabled |
| 45 | for vuln in $(ls /sys/devices/system/cpu/vulnerabilities/*) ; do | |
| 46 | if [ -r "${vuln}" ] && \ | |
| 47 | [[ "$(<${vuln})" =~ "SMT vulnerable" ]]; then | |
| 0bb25a4f | 48 | # Disable SMT |
| 6a83dbb4 MT |
49 | boot_mesg "Disabling Simultaneous Multi-Threading (SMT)..." |
| 50 | echo "forceoff" > /sys/devices/system/cpu/smt/control | |
| 51 | echo_ok | |
| 0bb25a4f MT |
52 | |
| 53 | # No need to check any further when we have disabled SMT already | |
| 54 | break | |
| 6a83dbb4 | 55 | fi |
| 0bb25a4f | 56 | done |
| 6a83dbb4 MT |
57 | ;; |
| 58 | ||
| 59 | *) | |
| 60 | echo "Usage: ${0} {start}" | |
| 61 | exit 1 | |
| 62 | ;; | |
| 63 | esac |